 Wednesday, 24 February 2016
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Wednesday, 24 February 2016
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OBAS (Optical brightener agents)
Optical brighteners, optical brightening agents (OBAs), fluorescent brightening agents (FBAs) or fluorescent whitening agents (FWAs) or Luminophores are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the electromagnetic spectrum, and re-emit light in the blue region (typically 420-470 nm).
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